The Shouting of the Lambs

Their name suggests an order of nuns, perhaps, or a sect of Christian pacifists. But the Lambs of Christ, in the words of one pro-choice leader, are "wolves in sheep's clothing." Although not so widely known as Operation Rescue, the Lambs may well be the most zealous and aggressive of the pro-life organizations that seek to shut down "killing centers" (abortion clinics) by intimidating protests that result in arrests and jail sentences for the protesters.

In communities across the U.S., from Asheville, N.C., to Fargo, N. Dak., the nomadic Lambs of Christ have focused attention on themselves and their targets with...